Well I changed from os 6.0.0.461 to this one because even though it gave me excellent battery life (1 1/2 to 2 days) at first soon it started giving me very very less I had to start charging even 7-8 hrs.the other thing i noticed was the camera after 4-5 pictures it would go mad like turn into large pink pixels.I have been running the os 6 for a month now and I must say it slowly eats the mobile phone.I am glad I am back to os 5 nothing like it.